Largest CDC COVID-19 Vaccine Study in Healthcare Workers Shows High Protection Results

Largest CDC COVID-19 Vaccine Study in Healthcare Workers Shows High Protection Results

The study was conducted throughout 25 states.

A new CDC study shows that COVID-19 mRNA vaccines authorized by the FDA protect healthcare personnel (HCP) against COVID-19. mRNA vaccines, including: Pfizer-BioNTech and Moderna, reduced the risk of getting sick with the disease by 94 percent among HCP who were fully vaccinated. This assessment was conducted in a large sample size across a broader geographic area than in the clinical trials that confirms vaccine effectiveness in the U.S. for healthcare workers.

“This report provided the most compelling information to date that COVID-19 vaccines were performing as expected in the real world,” said CDC Director Rochelle P. Walensky, MD, MPH. “This study, added to the many studies that preceded it, was pivotal to CDC changing its recommendations for those who are fully vaccinated against COVID-19.”

Data from the CDC comes from covering 500,000 HCP across 33 sites in 25 states. The vaccination process compared participants who tested positive to those who tested negative. According to a press release, among the 1,843 participants there were 623 cases and 1,220 controls. “Vaccine effectiveness estimates were calculated by comparing the odds of COVID-19 vaccination in cases and controls.”

The assessment concluded symptomatic cases were reduced by 94 percent among HCP who were fully vaccinated. 82 percent of those who were partially vaccinated defined this study 14 days after receiving the first dose through six days after the second dose. These findings support the CDC’s recommendation that everyone should get both doses of an mRNA vaccine to be most protected.

About the Author

Shereen Hashem is the Associate Content Editor for Occupational Health & Safety magazine.

Download Center

  • Lone Worker Safety Guide

    As organizations digitalize and remote operations become more commonplace, the number of lone workers is on the rise. These employees are at increased risk for unaddressed workplace accidents or emergencies. This guide was created to help employers better understand common lone worker risks and solutions for lone worker risk mitigation and incident prevention.

  • Online Safety Training Buyer's Guide

    Use this handy buyer's guide to learn the basics of selecting online safety training and how to use it at your workplace.

  • COVID Return-to-Work Checklist, Fall 2021

    Use this checklist as an aid to help your organization return to work during the COVID-19 pandemic in a safe and healthy manner.

  • SDS Buyer's Guide

    Learn to make informed decisions while searching for SDS Management Software.

  • Risk Matrix Guide

    Risk matrices come in many different shapes and sizes. Understanding the components of a risk matrix will allow you and your organization to manage risk effectively.

  • Industry Safe

Featured Whitepapers

OH&S Digital Edition

  • OHS Magazine Digital Edition - October 2021

    October 2021

    Featuring:

    • TRAINING
      On Route To Safe Material Handling
    • SAFETY CULTURE
      Normalization of Deviations in Performance
    • IH:INDOOR AIR QUALITY
      Arresting Fugitive Dusts
    • PPE:FOOT PROTECTION
      Safety Shoes Make the Outfit for Well-Protected Workers
    View This Issue